From cd4de50188af8836b8450c15d5b60332e1f2174b Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Thu, 25 Nov 2021 20:17:27 +0100
Subject: misc: add nix derivation

---
 .gitignore                                         |  2 +
 Makefile                                           | 18 ++++++-
 .../nixos/pkgs/os-specific/linux/vtcol/default.nix | 57 ++++++++++++++++++++++
 3 files changed, 76 insertions(+), 1 deletion(-)
 create mode 100644 misc/nixos/pkgs/os-specific/linux/vtcol/default.nix

diff --git a/.gitignore b/.gitignore
index ae0df3a..88c4ac6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,8 @@ todo
 
 # cargo junk
 Cargo.lock
+misc/nixos/pkgs/os-specific/linux/vtcol/cargo-lock.patch
 
 # manpage
 doc/vtcol.1.gz
+
diff --git a/Makefile b/Makefile
index a8db336..50dd1b2 100644
--- a/Makefile
+++ b/Makefile
@@ -7,8 +7,10 @@ lib-src 	= src/lib.rs
 src	 	= $(bin-src) $(lib-src)
 meta 		= Cargo.toml
 rustdoc-entry	= target/doc/vtcol/index.html
+cargo-lock	= Cargo.lock
+cargo-lock-patch= misc/nixos/pkgs/os-specific/linux/vtcol/cargo-lock.patch
 
-all: bin lib doc
+all: bin lib doc nix
 
 check: $(src)
 	cargo test 
@@ -23,6 +25,18 @@ man: $(manpage)
 
 rustdoc: $(rustdoc-entry)
 
+nix: lockpatch
+
+lockpatch: $(cargo-lock-patch)
+
+$(cargo-lock-patch): $(meta)
+	rm -f -- $(cargo-lock)
+	cargo update
+	cargo generate-lockfile
+	mkdir -p tmp
+	mv -f -- $(cargo-lock) tmp/
+	diff -u /dev/null tmp/$(cargo-lock) >$(cargo-lock-patch) ; :
+
 $(lib): $(lib-src) $(meta)
 	cargo build --release 
 
@@ -37,6 +51,8 @@ $(rustdoc-entry): $(src) $(meta)
 
 clean:
 	rm -f -- $(manpage)
+	rm -f -- $(cargo-lock)
 	rm -rf -- $(cargo-target)
+	rm -rf -- tmp
 
 .PHONY: clean check
diff --git a/misc/nixos/pkgs/os-specific/linux/vtcol/default.nix b/misc/nixos/pkgs/os-specific/linux/vtcol/default.nix
new file mode 100644
index 0000000..dec074b
--- /dev/null
+++ b/misc/nixos/pkgs/os-specific/linux/vtcol/default.nix
@@ -0,0 +1,57 @@
+{ lib, stdenv
+, cpio
+, docutils
+, rust
+, installShellFiles
+, fetchFromGitLab
+, rustPlatform
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "vtcol";
+  version = "0.42.5";
+
+  src = fetchFromGitLab {
+    domain = "gitlab.com";
+    owner = "phgsng";
+    repo = pname;
+    rev = "d6e8a37767644b50001e14ebbab594e799a94db7";
+    sha256 = "sha256-fHWxiuCFO+N+ubPCS/Is64V2pLzh7xozDcRo7pQLMBg=";
+  };
+
+  cargoSha256 = "sha256-NSwn3vavrsPr+qn6oQY6kO5d9TKrxwcnqO7a3qpBphs==";
+
+  nativeBuildInputs = [ docutils cpio installShellFiles ];
+
+  buildFeatures = [ "vtcol-bin" ];
+
+  cargoPatches = [ ./cargo-lock.patch ];
+
+  target = rust.toRustTargetSpec stdenv.hostPlatform;
+
+  # building the manpage requires docutils/rst2man
+  postInstall = ''
+    echo "create and install manpage"
+    make man
+    installManPage doc/vtcol.1.gz
+
+    echo "create cpio archive for initrd"
+    binout="target/${target}/release/${pname}"
+    ls "$binout"
+    mkdir -p -- tmp/usr/bin
+    ls
+    ls tmp
+    cp -f -- "$binout" tmp/usr/bin
+    pushd tmp
+    <<<usr/bin/${pname} cpio -ov -H ustar >${pname}.cpio
+
+    install -D -m644 ${pname}.cpio $out/share/vtcol/${pname}.cpio
+  '';
+
+  meta = with lib; {
+    description = "Color schemes for the Linux console";
+    homepage = "https://gitlab.com/phgsng/vtcol";
+    license = licenses.gpl3;
+    mainProgram = "vtcol";
+  };
+}
-- 
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